My dad has been diagnosed with early dementia. I am his POA. Can I by the house at fair market value?

He refinanced his home over a year ago. No equity in house, amount of 177,0000. I talked with Medicaid office he is financial guide lines to quality for Medicaid. We live in Alabama. I want to buy the house at fair market value. Can I do this without Medicaid placing a lien on the house. I would be totally buying house. No transfers, I would be buying the house at fair market value making the payments in my name, the house would then be owned by me not my dad. Help, I can't get answers